<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前位置</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.$store.state.city}}</div>
                    </div>
                </div>
            </div>

            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div 
                        class="button-wrapper" 
                        v-for="item of hotCities" 
                        :key="item.id"
                        @click="handleCityClick(item.name)"
                    >
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
            </div>

            <div class="area" 
                 v-for="(item, key) of cities"
                 :key="key"
                 :ref="key"
                
            >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div 
                        class="item border-bottom"
                        v-for="innerItem of item"
                        :key="innerItem.id"
                        @click="handleCityClick(innerItem.name)"
                    >
                    {{innerItem.name}}</div>
                </div>
            </div>
        </div>
    </div>
    
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'

export default {
    name: 'CityList',
    props: {
        cities: Object,
        hotCities: Array,
        letter: String
    },
    methods: {
        handleCityClick (city) {
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    },
    computed: {
        ...mapState({
            currentCity: 'city'
        })
    },
    watch: {
        letter () {
            if (this.letter) {
                const element = this.$refs[this.letter][0]
                this.scroll.scrollToElement(element)
            }
        }
    },
    mounted () {
        this.scroll = new Bscroll(this.$refs.wrapper)
    }

}
</script>

<style lang="stylus" scoped>
@import '~styles/variables.styl'
    .border-topbottom
        &:before
            border-color #ccc
        &:after
            border-color #ccc
    .border-bottom
        &:before
            border-color #ccc
    .list
        overflow hidden
        position absolute
        top 1.58rem 
        left 0
        right 0
        bottom 0
        // background-color pink
        .title 
            line-height .54rem
            background #eee
            padding-left .2rem
            color #666
            font-size .26rem
        .button-list
            padding .1rem .6rem .1rem .1rem
            overflow hidden
            .button-wrapper
                float left
                width 33.3%
                .button
                    text-align center
                    margin .1rem
                    padding .1rem 0
                    border .02rem solid #ccc
                    border-radius .06rem
        .item-list
            .item
                line-height .76rem
                padding-left .2rem
    
        

</style>